<template>
  <div>
    <!-- 导航栏 -->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 警告区域 :closable="false"(是否展示“X”号) show-icon(显示图标) -->
      <el-alert title="注意：只允许为第三级分类设置相关参数" type="warning" :closable="false" show-icon></el-alert>

      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>
            选择商品分类：
            <el-cascader
              v-model="selectedCateKeys"
              :options="cateList"
              :props="cateProps"
              :show-all-levels="true"
              clearable
              @change="handleChange"
            ></el-cascader>
          </span>
          {{selectedCateKeys}}
          {{cateId}}
          {{addForm}}
          <!-- 选择商品分类的级联选择框 -->
        </el-col>
        <el-col class="cat_tabs"></el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button size="mini" type="primary" :disabled="isButtonDisabled" @click="addFrom">添加参数</el-button>
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column label="#" type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
          {{manyTableData}}
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button size="mini" type="primary" :disabled="isButtonDisabled" @click="addFrom">添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
          {{onlyTableData}}
        </el-tab-pane>
      </el-tabs>
      <!-- 添加 动态参数或者 静态属性  -->
      <el-dialog
        title="提示"
        :visible.sync="addFormDialogVisible"
        width="50%"
        @close="handleCloseAddForm"
      >
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        {{addFrom.attr_name}}
        <span slot="footer" class="dialog-footer">
          <el-button @click="addFormDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 修改参数或属性对话框 -->
      <el-dialog
        :title="'修改'+titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @closed="editDialogClosed"
      >
        <!-- 添加表单 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 分类列表
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id'
      },
      //   级联选择框选中的值
      selectedCateKeys: [],
      //   tabs中默认选中的值
      activeName: 'many',
      // 用来保存动态参数数据
      manyTableData: [],
      // 用来保存静态属性数据
      onlyTableData: [],
      // 添加 动态参数说着静态属性 的dialog
      addFormDialogVisible: false,
      //  加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      // 添加表单验证规则
      addFormRules: {
        attr_name: [{ required: true, message: '请输入名称', trigger: 'blur' }]
      },
      //
      editDialogVisible: false,
      // 修改参数.属性对话框中的表单
      editForm: {
        attr_name: ''
      },
      // 修改表单的验证规则
      editFormRules: {
        attr_name: [{ required: true, message: '请输入名称', trigger: 'blur' }]
      }
    }
  },
  created() {
    //   获取商品参数列表
    this.getCateList()
  },
  methods: {
    //  获取商品参数列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 改变级联选择 改变后的操作
    async handleChange() {
      this.manyTableData = []
      this.onlyTableData = []
      // 如果选中的不是三级分类，那么把selected置为空
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        return false
      }
      //   获取当前tabs页中的数据
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: {
            sel: this.activeName
          }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取列表失败，请查看F12')
      }
      if (this.activeName === 'only') {
        this.onlyTableData = res.data
      } else if (this.activeName === 'many') {
        this.manyTableData = res.data
      }
    },
    // 点击tabs 上面的按钮 触发的事件
    async handleTabClick() {
      if (this.selectedCateKeys.length === 3) {
        //   获取当前tabs页中的数据
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: this.activeName
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取列表失败，请查看F12')
        }
        if (this.activeName === 'only') {
          this.onlyTableData = res.data
        } else if (this.activeName === 'many') {
          this.manyTableData = res.data
        }
      }
      return false
    },
    // 打开 添加 表单
    addFrom() {
      this.addFormDialogVisible = true
    },
    //  关闭  添加动态参数 和静态属性的 按钮
    handleCloseAddForm() {
      console.log(this)
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      // 当用户点击对话框中的确定时，校验表单
      this.$refs.addFormRef.validate(async (valid) => {
        // 校验不通过，return
        if (!valid) return false
        // 校验通过，发送请求完成添加参数或者属性
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
            attr_vals: 'a,b,c'
          }
        )

        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加' + this.titleText + '数据失败')
        }
        this.$message.success('添加' + this.titleText + '数据成功')
        this.addFormDialogVisible = false
        this.handleChange()
      })
    },
    async showEditDialog(id) {
      // 发起请求获取需要修改的那个参数数据
      const {
        data: res
      } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, {
        params: { attr_sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数数据失败')
      }
      console.log(res)
      this.editForm = res.data
      // 显示修改参数.属性对话框
      this.editDialogVisible = true
    },
    editDialogClosed() {
      // 当关闭修改参数.属性对话框时
      this.$refs.editFormRef.resetFields()
    },
    editParams() {
      // 验证表单
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return false

        // 发送请求完成修改
        const {
          data: res
        } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('获取参数数据失败')
        }
        this.$message.success('修改' + this.titleText + '数据成功')
        this.editDialogVisible = false
        this.handleChange()
      })
    },
    // 添加对应的事件处理函数
    async removeParams(id) {
      // 根据id删除对应的参数或属性
      // 弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        '请问是否要删除该' + this.titleText,
        '删除提示',
        {
          confirmButtonText: '确认删除',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch((err) => err)
      // 如果用户点击确认，则confirmResult 为'confirm'
      // 如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }

      // 没有取消就是要删除，发送请求完成删除
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除参数数据失败')
      }
      this.$message.success('删除' + this.titleText + '数据成功')
      this.handleChange()
    }
  },
  computed: {
    //   如果按钮禁用返回true，否则返回false
    isButtonDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    // 获取选中的 三级id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 添加 表单中的值
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }
}
</script>
<style lang="less" scoped>
.el-card {
  margin-top: 20px;
}
.cat_opt {
  margin: 20px 0;
}
.cat_tabs {
}
</style>
